US20220193734A1 - Cleaning device, compressed air system and cleaning method for supplying a medium pulse to a surface and corresponding control system and vehicle - Google Patents

Cleaning device, compressed air system and cleaning method for supplying a medium pulse to a surface and corresponding control system and vehicle Download PDF

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Publication number
US20220193734A1
US20220193734A1 US17/606,472 US202017606472A US2022193734A1 US 20220193734 A1 US20220193734 A1 US 20220193734A1 US 202017606472 A US202017606472 A US 202017606472A US 2022193734 A1 US2022193734 A1 US 2022193734A1
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Prior art keywords
medium
connection
pulse
chamber
nozzle
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US17/606,472
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English (en)
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Jan Cohrs
Jan Fiebrandt
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ZF CV Systems Europe BV
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ZF CV Systems Hannover GmbH
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Assigned to ZF CV SYSTEMS HANNOVER GMBH reassignment ZF CV SYSTEMS HANNOVER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Cohrs, Jan, FIEBRANDT, Jan
Publication of US20220193734A1 publication Critical patent/US20220193734A1/en
Assigned to ZF CV SYSTEMS EUROPE BV reassignment ZF CV SYSTEMS EUROPE BV ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZF CV SYSTEMS HANNOVER GMBH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/62—Other vehicle fittings for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens

Definitions

  • the disclosure relates to a cleaning device, to a compressed air system having a cleaning device, and to a corresponding cleaning method using the cleaning device or the compressed air system.
  • the disclosure further relates to a vehicle having the cleaning device or compressed air system.
  • Cleaning devices in particular for cleaning a sensor, preferably a number of one or more sensors in a vehicle, are widely known, e.g. in the form of a piston injector for sensor cleaning.
  • such a cleaning device serves to supply a medium pulse to a surface, in particular a surface of a sensor, preferably an optical sensor, in particular an environment detection sensor, and has: a pressure cylinder, having a pressure connection, a medium connection and a first nozzle connection, wherein a separating and displacing means having a first and/or second pressure transmitter surface is arranged in the pressure cylinder in order to divide the volume of the pressure cylinder into a first medium chamber and a second medium chamber and to change a volume of the first and second medium chambers.
  • the concept is still in need of improvement, especially in respect of the dependence of the cleaning device on liquid-based cleaning and the resulting additional liquid pump and the associated increased outlay in terms of equipment and therefore in terms of maintenance. It is desirable to ensure reliable and thorough cleaning, in particular with relatively low outlay, especially in terms of equipment. Furthermore, a low consumption of energy and cleaning media is desirable, as is robust, in particular as low-maintenance as possible, construction.
  • the present disclosure provides a cleaning device for supplying a medium pulse to a surface.
  • the cleaning device includes a pressure cylinder having a pressure connection, a medium connection, and a first nozzle connection.
  • the cleaning device further includes a separator and displacer, having a first and/or second pressure transmitter surface, arranged in the pressure cylinder in order to divide a volume of the pressure cylinder into a first medium chamber and a second medium chamber and configured to change a volume of the first and second medium chambers.
  • the cleaning device includes a switching valve having a first pressure cylinder connection, a first medium source connection, and a second nozzle connection, the switching valve being configured to switch into a first switching state and a second switching state.
  • the first medium chamber In the first switching state, the first medium chamber is configured to be connected, via the pressure connection, to the first medium source connection in order to reduce the volume of the second medium chamber, and in the second switching state, the first medium chamber is connected, via the pressure connection, to the second nozzle connection in order to increase the volume of the second medium chamber such that the surface can be supplied with the medium pulse, the medium pulse being a medium pulse of a liquid medium and/or a medium pulse of a gaseous medium.
  • FIG. 1 shows the schematic view of a preferred embodiment of a cleaning device—showing in detail X a pulse sequence of medium pulses;
  • FIG. 2A shows the schematic view of a further preferred embodiment of a pressure cylinder
  • FIG. 2B shows the schematic view of a further preferred embodiment of a pressure cylinder
  • FIG. 3A shows the schematic view of a further preferred embodiment of a cleaning device, in particular with a solenoid valve
  • FIG. 3B shows schematically a first switching state of a solenoid valve of a preferred embodiment of a cleaning device
  • FIG. 3C shows schematically a second switching state of a solenoid valve of a preferred embodiment of a cleaning device
  • FIG. 4 shows a schematic illustration of a compressed air system, in particular with a double check valve
  • FIG. 5 shows a schematic illustration of a compressed air system with a second switching valve, in particular a second solenoid valve
  • FIG. 6 shows a sequence of a preferred cleaning process in one embodiment
  • FIG. 7 shows a schematic illustration of a control system in one embodiment
  • FIG. 8 shows a schematic illustration of a vehicle having a sensor system in one embodiment.
  • aspects of the present disclosure provide a device and a method which at least partially eliminate the problems addressed above.
  • a cleaning device and a compressed air system are disclosed with which reliable and thorough cleaning is ensured, in particular with a relatively low outlay, particularly in terms of equipment.
  • a cleaning method is disclosed which achieves a high degree of reliability and thoroughness in cleaning, while nevertheless making it possible to reduce the outlay in terms of equipment and the outlay with regard to maintenance of a cleaning device. Consumption of energy and cleaning media is also to be achieved.
  • the consumption of water is to be limited or superfluous.
  • a cleaning device includes a pressure cylinder, having a pressure connection, a medium connection and a first nozzle connection, wherein a separating and displacing means having a first and/or second pressure transmitter surface is arranged in the pressure cylinder in order to divide the volume of the pressure cylinder into a first medium chamber and a second medium chamber and to change a volume of the first and second medium chambers.
  • a switching valve which has a first pressure cylinder connection, a first medium source connection and a second nozzle connection and is designed for switching into a first switching state and a second switching state, wherein furthermore, in the first switching state, the first medium chamber can be connected via the pressure connection to the first medium source connection in order to reduce the volume of the second medium chamber, and in the second switching state, the first medium chamber can be connected via the pressure connection to the second nozzle connection in order to increase the volume of the second medium chamber, in such a way that the surface can be supplied with a medium pulse of a liquid medium, and/or a medium pulse of a gaseous medium.
  • a pressure cylinder having a pressure connection, a medium connection and a first nozzle connection is generally advantageous for keeping expenditure in the cleaning of surfaces low.
  • a separating and displacing means having a first and/or second pressure transmitter surface is arranged in the pressure cylinder in order to divide the pressure cylinder into a first medium chamber and a second medium chamber and to change the volume of the first and second medium chambers. This applies in particular to the cleaning of surfaces of a sensor or a sensor cover, for which a clean surface is a prerequisite for the proper and reliable functioning of the sensor.
  • the first medium chamber in the first switching state, can be connected via the pressure connection to the first medium source connection in order to reduce the volume of the second medium chamber, and in the second switching state, the first medium chamber can be connected via the pressure connection to the second nozzle connection in order to increase the volume of the second medium chamber.
  • An additional fluid pump for the liquid medium, in particular water, can be made superfluous.
  • the concept can also be implemented only with a gaseous medium, that the first and second switching states are designed in such a way that the surface can be supplied with a medium pulse of a liquid medium and/or a medium pulse of a gaseous medium.
  • the cleaning effect of the pulse of a medium pulse is achieved, inter alia, by the mass of the medium.
  • An impact speed of the medium on the surface and a relatively rapid triggering of the supply is advantageously increased. Rapid triggering of the supply leads—especially in contrast to a slowly and continuously increasing flow of the medium—to impingement, in particular, of a limited air mass stored in a reservoir on the surface in a relatively short period of time.
  • the period of time can advantageously be set by means of comparatively fast “switching back and forth” between the first and second switching states. In this way, too, a high momentum for the medium pulse is advantageously achieved.
  • a reduction in the outlay in terms of equipment and the expenditure of water is thus achieved in a particularly advantageous manner. This is accompanied by a reduction in the susceptibility to faults of the cleaning device, leading to reduced maintenance intervals and consequently to increased availability of the cleaning device.
  • a compressed air system includes at least one cleaning device and at least one sensor of a sensor system, wherein the sensor, in particular a transparent cover of the sensor, has a surface.
  • a first medium source of the compressed air system can be connected via a first medium feed line to the first medium source connection of the at least one cleaning device, and a second medium source can be connected via a second medium feed line to the medium connection of the at least one cleaning device, and at least one nozzle can be connected via a first nozzle feed line to the first nozzle connection and via a second nozzle feed line to the second nozzle connection of the at least one cleaning device.
  • the advantages resulting from the cleaning device are transferred to a compressed air system.
  • the lower outlay in terms of equipment as a result of the elimination of the fluid pump which is otherwise additionally required and the lower dependence on mechanically moving parts is advantageous for applications in vehicles and the like machines, in particular mobile machines.
  • a cleaning method provides for the use of at least one cleaning device and/or a compressed air system for supplying a medium pulse to a surface.
  • a switching valve is provided, which has a first pressure cylinder connection, a first medium source connection and a second nozzle connection, and is switched into a first switching state and a second switching state.
  • the first medium chamber is connected via the pressure connection to the first medium source connection in order to reduce the volume of the second medium chamber
  • the first medium chamber is connected via the pressure connection to the second nozzle connection in order to increase the volume of the second medium chamber, in such a way that the surface is supplied with a medium pulse of a liquid medium, and/or a medium pulse of a gaseous medium.
  • a vehicle has at least one cleaning device and/or a compressed air system and/or a control system having an open-loop and/or closed-loop control device, wherein the open-loop and/or closed-loop control device is designed to carry out steps of the cleaning method.
  • the advantages of the compressed air system and of the control system are advantageously transferred analogously to the vehicle.
  • the advantages of the cleaning device are also advantageously transferred analogously to the control system.
  • the compressed air system when used in a vehicle, the lower consumption of energy and cleaning media has an advantageous effect since energy and cleaning media are only available to a limited extent in vehicles and comparable mobile systems. Reliable cleaning is also important in a vehicle since sensors to be cleaned often take on critical and safety-relevant tasks.
  • the separating and displacing means has a first and/or second pressure transmitter surface in the first medium chamber and/or the second medium chamber of the pressure cylinder, wherein the first and/or second pressure transmitter surface can be subjected to different pressures, in particular to produce a pressure difference in order to produce the medium pulse.
  • a small compressed air accumulator is achieved which empties simply on account of the excess pressure (e.g. 3-5 bar) prevailing there and thus supplies the surface.
  • the pulse force of the compressed air pulse (e.g. from the second or first medium chamber) results, in particular, from the expansion or pressure equalization via one of the nozzles.
  • pulse-type loading of the surface can advantageously take place additionally or first on the basis of a restoring force of the separating or displacing means of the pressure cylinder as such or of a return means, in the present scenario this is in addition to the effect which results from the fact that the first and/or second pressure transmitter surface can be subjected to different pressures.
  • the pulse force of the medium from the first medium chamber then results primarily from the application of pressure to the displacing means. Secondarily, this can also result correspondingly on the basis of a restoring force if this has been configured accordingly by virtue of the design.
  • the first medium thus already has a pressure equalization potential with respect to the ambient pressure owing to the pressure difference at the first and second pressure transmitter surfaces, irrespective of further forces in the pressure cylinder.
  • the restoring force of the return means can then also act in the course of the pressure equalization.
  • provision may—but need not—be made for the first medium chamber and/or the second medium chamber of the pressure cylinder additionally to have a return means.
  • provision is made for the pressure transmitter surface to be able to be acted upon by pressure on the side of the first medium chamber and/or to be able to be acted upon by a restoring force by way of the return means.
  • this can mean that the volume change of the first, and similarly, the second medium chamber is achieved by means of the pressure transmitter surface movable in the pressure cylinder, on the side of the first medium chamber by way of the pressure prevailing in the gaseous medium.
  • the pressure transmitter surface is returned to an initial position by means of a pressure difference, in particular by means of a return means or by means of the restoring force exerted by the return means on the pressure transmitter surface, wherein the return means can be arranged in the second medium chamber, in the first medium chamber or in both medium chambers.
  • the return means can be dispensed with or can be provided only in the first medium chamber or only in the second medium chamber or can be divided between the first medium chamber and the second medium chamber in order to optimize the usable volume of the second medium chamber or the service life of the return means.
  • the surface to be supplied with a medium pulse of the liquid medium, namely in the first switching state with a first medium pulse, preferably in the form of a water pulse or similar liquid pulse, and/or a medium pulse of the gaseous medium, namely in the second switching state with a second medium pulse, preferably in the form of a compressed air pulse.
  • a pulse-type supply of the gaseous or the liquid medium to a surface from the second medium chamber can be achieved on the one hand by means of a pulse-type displacement of the pressure transmitter surface in the pressure cylinder—and thus by means of a pulse-type reduction in the volume of the second medium chamber.
  • a pulse-type displacement of the pressure transmitter surface in the pressure cylinder that is to say by resetting the pressure transmitter surface—and thus by means of a pulse-type increase in the volume of the second medium chamber—a further pulse-type supply of the gaseous medium to a surface from the first medium chamber is achieved on the other hand.
  • pulse-type can refer, in general, to a sudden, jerky supply of a medium to a surface, the momentum of which medium is suitable, in particular, for mechanically detaching and removing particles, in particular dirt particles, located on the surface.
  • pulse-type emptying of the second medium chamber is brought about via the first nozzle connection by means of the first medium chamber.
  • pulse-type emptying of the first medium chamber can be brought about via the second nozzle connection via the restoring force, in particular against a pressure difference between the first pressurized chamber and ambient pressure in the sense of a pressure equalization as a result of expansion of the gaseous medium in the first medium chamber.
  • a pulse intensity of the pulse-type emptying via the second nozzle connection of the first medium chamber in the sense of said expansion of the gaseous medium into the environment via the second nozzle connection is likewise dependent on the pressure of the gaseous medium prevailing there.
  • the second medium chamber of the pressure cylinder can be refilled at the same time with the liquid medium and the gaseous medium via the medium connection.
  • this can mean that the pulse-type emptying of the first medium chamber generates a vacuum in the second medium chamber, this resulting in induction of the gaseous medium and of the liquid medium at the medium connection of the second medium chamber.
  • the medium pulse emitted by the cleaning device is a sequence of medium pulses, the composition and succession of which can be controlled in terms of time, in particular selectively and/or intermittently. This can be done specifically, in particular, by activating the switching valve.
  • optimum cleaning of the surface can advantageously be achieved by means of time-controlled application.
  • Selective means, in particular, that only one medium is supplied to the surface at any one time. In concrete terms, this can mean, in particular, that the application of one, for example gaseous, medium is completely interrupted, and then the application of the other, for example liquid, medium is started and, conversely, the application of the gaseous medium is continued again only after the application of the liquid medium is interrupted.
  • pauses in particular also within a medium sequence, can lie between the applications in order, for example, to soften dirt particles.
  • Intermittent furthermore means, in particular, that the respective medium flows, in particular the flows of the gaseous medium and of the liquid medium, can in each case be triggered and interrupted.
  • the volume of the pressure cylinder defines a volume flow of the gaseous and/or liquid medium which can be generated by the pressure cylinder.
  • this can mean that a volume flow that can be generated can be set in an advantageous manner by means of the design configuration of the pressure cylinder. This eliminates the need for complex volume flow control for each medium.
  • the outlay in terms of equipment is significantly reduced, as is similarly the susceptibility of the cleaning device to faults. If, in addition, a higher or a lower volume flow becomes necessary during the operation of the system, this is advantageously possible by simply replacing the pressure cylinder. It is furthermore conceivable, for example, to make the first medium chamber larger than the second medium chamber or vice versa.
  • a pressure transmitter surface in the pressure cylinder which divides the latter into a first medium chamber and a second medium chamber, is advantageously a component of the separating and displacing means.
  • the pressure cylinder has the separating and displacing means to bring about pulse-type emptying of the second medium chamber via the first nozzle connection, wherein the pulse intensity of the pulse-type emptying of the second medium chamber via the first nozzle connection can be controlled using a pressure of the gaseous medium prevailing in the first medium chamber.
  • a pulse intensity of the medium in the second medium chamber can be set in a particularly advantageous manner via the pressure in the gaseous medium since this pressure is decisive for the speed of the displacement of the separating and displacing medium in the pressure cylinder and thus for the pulse intensity which can be generated.
  • Compressed air in particular, can be handled in a simple manner from the point of view of open-loop and closed-loop control, thus resulting in a simple possibility of setting the pulse intensity for both medium flows.
  • a first and/or second valve cross section can be predetermined in such a way that a pulse intensity for bringing about pulse-type emptying of the first and/or second medium chamber can be defined by means of said valve cross section/s.
  • the separating and displacing means for example, it is likewise possible to control the volume flow of the gaseous and liquid medium.
  • a higher volume flow is made possible than in the embodiment as a diaphragm since the piston has greater displaceability within the pressure cylinder.
  • an increased volume flow of the medium in the second medium chamber can thus be generated by way of a volume reduction of said chamber, that is to say by complete displacement of the medium from the second medium chamber.
  • the return means is preferably made for the return means to be a compression spring and/or tension spring, the restoring force of the compression spring and/or tension spring being dimensioned in such a way that the separating and displacing means adopts an initial position, provided that the pressure transmitter surface is not subjected to pressure.
  • designing the return means as a compression and/or tension spring provides a simple and thus low-cost way of resetting the selected separating and displacing means to an initial position after the gaseous medium has been discharged from the first medium chamber in order in this way to start a new application cycle.
  • a suitable choice of the pressure ratio with respect to the environment likewise proves to have an influence on the achievable speed of the pulse sequence of the individual applications of the gaseous and the liquid medium. Furthermore, this pressure difference determines the achievable cleaning force—to this extent the maximum pulse force of the pulse of a medium pulse on the surface—with which individual dirt particles can be detached. Speed adjustment is thus advantageously allowed.
  • the switching valve is designed, in particular, as a solenoid valve and that the latter has a first predetermined valve cross section.
  • the switching valve is alternatively designed as a double check valve, wherein the double check valve has a second predetermined valve cross section. It has proven advantageous for the second predetermined valve cross section to be larger than the first valve cross section of the solenoid valve.
  • the double check valve can also be designed as a quick-action vent valve.
  • the switching valve can advantageously either be designed as a solenoid valve, this type of valve being easy to manage, particularly from the point of view of open-loop and closed-loop control, or can be designed as a double check valve or quick-action vent valve with a larger valve cross section, this configuration likewise permitting the generation of the compressed air pulse. It is thus advantageously possible, in the specific technical configuration of the cleaning device, to adapt the switching valve in accordance with the operating conditions to be expected.
  • the liquid medium can be mixed with an additive, in particular a liquid such as, for example, a cleaning and/or antifreeze liquid.
  • a liquid such as, for example, a cleaning and/or antifreeze liquid.
  • the cleaning effect of the second medium, in particular water is thereby increased in an advantageous manner. It is conceivable, for example, that contaminants containing oil may wet the surface to be treated. In this situation, water alone would have a significantly lower cleaning effect than a mixture of water and a cleaning agent, in particular a grease- and oil-dissolving cleaning agent.
  • adding an antifreeze to the liquid medium prevents the cleaning device from freezing at low temperatures. Thus, the cleaning device remains usable even in winter.
  • the liquid medium can also be heatable.
  • the cleaning system is likewise capable, in particular, of supplying only the gaseous medium to the surface.
  • Liquid medium is preferably to be discharged from the cleaning device only in conjunction with the gaseous medium, that is to say for water and air cleaning.
  • supply with compressed air only can be used to dry the surface.
  • the cleaning device also to have a second switching valve, which has a second pressure cylinder connection, a second medium source connection and a third medium source connection, for selecting a first switching state and a second switching state.
  • the second medium chamber of the pressure cylinder can be connected via the medium connection to the second medium source connection and, in the second switching state of the second switching valve, it can be connected in turn to the third medium source connection.
  • this can mean that a further switching valve is connected upstream of the medium connection of the pressure cylinder in order to control filling of the second medium chamber with a medium from the second or third medium source.
  • the first and second medium sources provide a gaseous or liquid medium.
  • a first check valve to be arranged in the first nozzle feed line and/or for a second check valve to be arranged in the second medium feed line.
  • a first and/or second check valve advantageously provide/s a threshold pressure above which a medium pulse is emitted to the nozzle or a medium, in particular a medium pulse, is emitted to the pressure cylinder. Moreover, the first and/or second check valve prevent/s an unwanted intake of ambient air via the first nozzle and the return flow of the second medium from the second medium chamber into the second medium source.
  • the at least one nozzle prefferably be designed with a common outlet opening for the gaseous and liquid medium.
  • the at least one nozzle is designed with separate outlet openings for the gaseous medium and the liquid medium.
  • the compressed air system in a third variant, provision is made for the compressed air system to have two nozzles, namely a first and second nozzle.
  • a first nozzle can be connected via the first nozzle feed line to the first nozzle connection and a second nozzle can be connected via the second nozzle feed line to the second nozzle connection of the at least one cleaning device.
  • the gaseous medium can be delivered in the first nozzle and the liquid medium can be delivered in the second nozzle.
  • this can mean that the design configuration of the specific nozzle configuration can advantageously be adapted flexibly to the respective purpose.
  • a variant having one nozzle and one outlet opening reduces the outlay in terms of equipment and thus reduces weight and costs.
  • a variant with separate outlet openings for the gaseous medium and the liquid medium offers the advantage that the outlet angle of the media relative to one another and to the surface to be acted upon can be chosen in a particularly advantageous way. In particular, it is possible in this way to make the gaseous medium act at a different angle than the liquid medium. It is thereby possible, for example, advantageously to increase the efficiency of the cleaning process and to adapt it to the respective purpose.
  • the first medium source is a compressed air source, in particular a compressor
  • the second medium source is a fluid tank, in particular a water tank.
  • this can mean that the compressed air system in such a development can advantageously be integrated into a vehicle or similar mobile system since a vehicle generally already has a compressor and a water tank. In this way, necessary design changes to the vehicle or similar mobile system are advantageously minimized.
  • the first medium source will serve another primary purpose, in particular that of supplying an air spring system or similar pneumatic system.
  • an already existing medium source in particular a compressed air source, can advantageously be used to supply the cleaning device. This is advantageous particularly in the case of use in a vehicle or similar mobile system since the number of components required is reduced and thus weight, costs and energy can be saved.
  • the second medium source will serve another primary purpose, in particular that of supplying a window cleaning system or similar cleaning system.
  • an already existing medium source in particular a liquid and/or cleaning agent source, can advantageously be used to supply the cleaning device. This is advantageous particularly in the case of use in a vehicle or similar mobile system since the number of components required is reduced and thus weight, costs and energy can be saved.
  • the senor in a preferred development of the compressed air system, provision is made for the sensor to be an optical sensor, in particular an environment detection sensor, for example a LIDAR sensor, a radar sensor, a camera or the like.
  • a cleaning device is particularly advantageous since the regular cleaning of the sensor surface improves the functioning of the sensor, particularly since the optical properties of the sensor depend on the transparency and/or translucency of the sensor surface.
  • a third medium source can be connected via the second medium feed line to the medium connection of the at least one cleaning device, wherein the third medium source is the ambient air.
  • the second medium chamber can be filled with a gaseous medium, that is to say with the ambient air.
  • pulse-type charging of the first medium chamber of the pressure cylinder with the gaseous medium, in particular compressed air takes place, pulse-type displacement of the gaseous medium, in particular compressed air, or of the liquid medium, in particular water, from the second medium chamber of the pressure cylinder takes place; and the gaseous medium, in particular compressed air, or the liquid medium, in particular water, is supplied to the surface in a pulse-type manner from the second medium chamber of the pressure cylinder.
  • pulse-type discharge of the gaseous medium, in particular compressed air, from the first medium chamber of the pressure cylinder takes place; and the gaseous medium, in particular compressed air, is supplied to the surface in a pulse-type manner from the first medium chamber of the pressure cylinder.
  • the advantages are obtained in a manner similar to the advantages of the cleaning device.
  • the following steps are also provided: returning the pressure transmitter surface of the separating and displacing means, in particular the piston or the like, to the initial position by means of the restoring force; and automatic filling of the second medium chamber of the pressure cylinder with the gaseous medium, in particular compressed air, or the liquid medium, in particular water, by generating a vacuum in the second medium chamber of the pressure cylinder by means of the return of the pressure transmitter surface of the separating and displacing means to the initial position.
  • a surface is supplied with a medium pulse, with a medium pulse, and the medium pulse is part of a sequence of medium pulses, in particular wherein a composition and/or succession of the sequence of medium pulses can be controlled, preferably in terms of time, selectively and/or intermittently.
  • the development is based on the insight that a surface to be cleaned can be supplied with a medium pulse, in particular a succession of at least two selectively controlled gaseous and/or liquid media which are each guided onto the surface in a jet. This may, but need not, take place in the form of one or more pulses, that is to say in a pulse-type manner, and leads to a high cleaning effect.
  • the term “selectively controlled” means an alternate succession of supply with a fluid pulse, such as a water pulse, followed by supply with one or more compressed air pulses.
  • the cleaning method that the pressure cylinder can be designed to sequentially hold either the gaseous medium in the first medium chamber or the liquid medium and the gaseous medium in the second medium chamber.
  • the pressure cylinder functions as a type of alternating reservoir, wherein, after the discharge of the medium from the first medium chamber, the second medium chamber stores the medium to be discharged next and vice versa.
  • a pneumatic system for supplying the first medium source with the gaseous medium is connected to the compressed air system, and a window cleaning system for supplying the second medium source with the liquid medium is connected to the compressed air system.
  • a window cleaning system for supplying the second medium source with the liquid medium is connected to the compressed air system.
  • FIG. 1 shows the schematic view of one embodiment of the cleaning device 100 for supplying a medium pulse MP to a surface O, which has a switching valve 110 in the present form.
  • the switching valve 110 has a pressure cylinder connection 111 , a first medium source connection 112 and a second nozzle connection 113 and is designed to produce a connection between these connections.
  • a connection between the first medium source connection 112 and the pressure cylinder connection 111 can be established via the switching valve 110 .
  • a connection between the pressure cylinder connection 111 and the second nozzle connection 113 can in turn be established via the switching valve 110 .
  • the second nozzle connection 113 can then furthermore be connected to a number of nozzles D 2 , wherein the number is indicated symbolically in FIG. 1 by the second nozzle D 2 .
  • the switching valve 110 is furthermore connected via the pressure cylinder connection 111 to a pressure connection 121 of a pressure cylinder 120 .
  • This pressure cylinder 120 furthermore has a medium connection 122 and a first nozzle connection 123 .
  • the first nozzle connection 123 can likewise furthermore be connected to a number of nozzles D 1 , wherein the number is indicated symbolically in FIG. 1 by the first nozzle D 1 .
  • the cleaning device 100 shown schematically in FIG. 1 furthermore has a first and second pressure transmitter surface 124 . 1 , 124 . 2 of a separating and displacing means 125 , which divides the pressure cylinder 120 into a first medium chamber 130 and a second medium chamber 140 .
  • the pressure connection 121 is assigned to the first medium chamber 130
  • the medium connection 122 and the first nozzle connection 123 are assigned to the second medium chamber 140 .
  • the separating and displacing means 125 thus has a first and/or second pressure transmitter surface 124 . 1 , 124 . 2 in the first medium chamber 130 and the second medium chamber 140 of the pressure cylinder 120 , wherein the first and/or second pressure transmitter surface 124 . 1 , 124 . 2 can be subjected to different pressures in alternation, in particular to produce a pressure difference in order to produce the medium pulse.
  • a small compressed air accumulator is then achieved which empties itself or the other chamber simply on account of the excess pressure (e.g.
  • the pulse force of the compressed air pulse results, in particular, from the expansion or pressure equalization via one of the nozzles D 1 , D 2 .
  • pulse-type supply to the surface can advantageously take place additionally or first on the basis of a restoring force F R of the separating or displacing means 125 of the pressure cylinder 120 as such or of a return means 126 , in the present scenario this is in addition to the effect which results from the fact that the first and/or second pressure transmitter surface 124 . 1 , 124 . 2 can be subjected to different pressures.
  • the pulse force of the medium from the first medium chamber 130 then results primarily from the application of pressure to the displacing means 125 . Secondarily, this can also result correspondingly on the basis of a restoring force F R of a return means 126 if this has been configured accordingly by virtue of the design.
  • the first medium thus already has a pressure equalization potential with respect to the ambient pressure owing to the pressure difference at the first and second pressure transmitter surfaces 124 . 1 , 124 . 2 , irrespective of further forces in the pressure cylinder 120 .
  • the F R of a return means 126 can then also act in the course of the pressure equalization, in particular to produce a pressure difference in order to produce the medium pulse.
  • a return means 126 is thus shown which is arranged in the second medium chamber 140 in the present case and generates a restoring force F R ; in another embodiment, however, it is also possible for a water pressure to provide for the restoring force. In the present case, this restoring force F R acts in turn on the second pressure transmitter surface 124 . 2 , which is shown in FIG. 1 in an initial position A 0 .
  • the first medium chamber 130 can therefore be connected or is connected via the pressure connection 121 to the first medium source connection 112 in order to reduce the volume V of the second medium chamber 140 , and, in the second switching state S 2 of the switching valve 110 , the first medium chamber 130 can be connected or is connected via the pressure connection 121 to the second nozzle connection 113 in order to increase the volume V of the second medium chamber 140 .
  • the surface O can be supplied with a medium pulse MP of a liquid medium M 2 , and/or a medium pulse MP of a liquid medium M 1 and, in this embodiment, it is implemented specifically as follows.
  • the surface O is supplied with a medium pulse MP of the liquid medium M 2 , namely in the first switching state S 1 with a first medium pulse MP 1 , preferably in the form of a water pulse or similar liquid pulse, and/or a medium pulse MP of the gaseous medium M 1 , namely in the second switching state with a second medium pulse MP 2 , preferably in the form of a compressed air pulse.
  • a first medium source MQ 1 in particular a compressed air source, which is only indicated in FIG. 1 , supplies the first medium source connection 112 of the switching valve 110 with a gaseous medium M 1 , in particular with compressed air.
  • This gaseous medium M 1 is then passed via the pressure cylinder connection 111 of the switching valve 110 to the pressure connection 121 of the pressure cylinder 120 and subsequently expands in a pulse-type manner in the first medium chamber 130 .
  • first and second pressure transmitter surfaces 124 . 1 , 124 . 2 are displaced in the direction of the first nozzle connection 123 of the pressure cylinder 120 , with the return means being compressed.
  • the gaseous medium M 1 or liquid medium M 2 located in the second medium chamber 140 thus acts in a pulse-type manner on the first nozzle connection 123 and is conveyed via the latter to a first nozzle D 1 , which is only indicated here.
  • the latter then supplies a first medium pulse MP of gaseous medium M 1 or liquid medium M 2 to the surface O.
  • the switching valve 110 If the switching valve 110 is subsequently switched into the second switching state S 2 , the switching valve in this case establishing a connection between the pressure cylinder connection 111 and the second nozzle connection 113 , a flow path to a second nozzle D 2 , likewise only indicated here, is opened to the pressurized gaseous medium M 1 . In comparison with the first switching state S 1 of the switching valve 110 , there is thus a reversal of the direction of flow. In addition, the gaseous medium M 1 in the first medium chamber 130 is acted upon by a restoring force F R via the return means 126 and the second pressure transmitter surface 124 . 2 .
  • the gaseous medium M 1 flows via the second nozzle connection 113 of the switching valve 110 in a pulse-like manner to an indicated second nozzle.
  • the latter then supplies a second medium pulse MP of gaseous medium M 1 to the surface O.
  • the pressure transmitter surface 124 returns once more to an initial position A 0 .
  • a vacuum is produced in the second medium chamber 140 , by means of which vacuum induction of a gaseous medium M 1 or a liquid medium M 2 can be brought about at the medium connection 122 , and thus refilling of the second medium chamber 140 of the pressure cylinder 120 can be effected.
  • the outlined process of supplying a medium pulse MP of the gaseous medium M 1 or of the liquid medium M 2 to a surface O via the second medium chamber 140 in the first switching state 51 of the switching valve 110 , and of subsequently supplying a medium pulse MP of the gaseous medium M 1 to a surface O via the first medium chamber 130 in the second switching state S 2 of the switching valve 110 , can be expanded, by suitable control of the switching valve 110 , to form a sequence of medium pulses MP n .
  • the surface O is thus supplied with a medium pulse MP, and the medium pulse MP is part of a sequence of medium pulses MPG, which are illustrated in detail X in FIG. 1 .
  • a composition and/or succession of the sequence of medium pulses MP n can be controlled, preferably in terms of time, selectively and/or intermittently.
  • FIG. 2A shows the schematic view of a further preferred embodiment, in particular of the pressure cylinder 120 of the cleaning device 100 .
  • the embodiment shown schematically in FIG. 2A again has a pressure connection 121 , a medium connection 122 and a first nozzle connection 123 , and furthermore a first and second pressure transmitter surface 124 . 1 , 124 . 2 , which divides the pressure cylinder into a first medium chamber 130 and a second medium chamber 140 , and a return means 126 .
  • the embodiment shown has a separating and displacing means, in the present case in the form of a diaphragm 125 B.
  • the diaphragm 125 B can be acted upon by pressure on the side of the first medium chamber 130 ; in any case, however, it can be acted upon by different pressures on the side of the first and second medium chambers 130 , 140 .
  • the diaphragm 125 B can additionally be subjected to a restoring force F R by means of the return means 126 .
  • the momentum of the pressurized gaseous medium M 1 expanding in the first medium chamber 130 can be transferred in a pulse-type manner via the diaphragm 125 B to the gaseous medium M 1 or the liquid medium M 2 in the second medium chamber 140 .
  • the diaphragm 125 B bulges in the direction of the second medium chamber 140 and consequently reduces its volume.
  • the gaseous medium M 1 or the liquid medium M 2 in the second medium chamber 140 acts in a pulse-type manner on the first nozzle connection 123 , the gaseous medium M 1 or the liquid medium M 2 being fed via the first nozzle connection 123 to a nozzle, not shown here, for supplying a medium pulse MP of the gaseous medium M 1 or of the liquid medium M 2 in the second medium chamber 140 to a surface O.
  • the return means 126 then returns the diaphragm 125 B, as a result of which a vacuum is produced in the second medium chamber 140 , by means of which vacuum induction of a gaseous medium M 1 or a liquid medium M 2 can be brought about at the medium connection 122 , and thus refilling of the second medium chamber 140 of the pressure cylinder 120 can be effected.
  • FIG. 2B furthermore shows the schematic view of a further preferred embodiment, in particular of the pressure cylinder 120 of the cleaning device 100 .
  • the separating and displacing means is in the present case in the form of a folded bellows 125 C.
  • the illustration of the technical function for the embodiment shown in FIG. 2A with a diaphragm 125 B applies analogously to the folded bellows 125 C.
  • the first medium chamber 130 in the first switching state S 1 of the switching valve 110 , can therefore be connected or is connected via the pressure connection 121 to the first medium source connection 112 in order to reduce the volume V of the second medium chamber 140 , and, in the second switching state S 2 of the switching valve 110 , the first medium chamber 130 can be connected or is connected via the pressure connection 121 to the second nozzle connection 113 in order to increase the volume V of the second medium chamber 140 .
  • FIG. 3A shows the schematic view of a preferred embodiment of the cleaning device 100 for supplying a medium pulse MP to a surface O, the switching valve 110 from FIG. 1 being designed in the present form as a controllable 3/2-way solenoid valve 110 . 1 .
  • FIG. 3A shows a first check valve 150 and a second check valve 160 .
  • the separating and displacing means 125 is designed as a piston 125 A and the return means 126 is designed as a compression and/or tension spring DZF. Since, in the present case, the return means 126 is arranged in the second medium chamber 140 , the compression and/or tension spring DZF is in this case designed specifically as a compression spring. All other reference signs in FIG. 3A have a meaning analogous to that in FIG. 1 .
  • the first check valve 150 is assigned to the first nozzle connection 123 of the second medium chamber 140
  • the second check valve 160 in turn being assigned to the medium connection 122 of the second medium chamber 140 of the pressure cylinder 120 .
  • the first check valve 150 is designed, in the second switching state S 2 of the solenoid valve 110 . 1 , to prevent induction of a medium, in particular air, via the first nozzle connection 123 of the second medium chamber 140 of the pressure cylinder 120 .
  • the second medium chamber 140 sucks in exclusively a gaseous medium M 1 or a liquid medium M 2 via the medium connection 122 in order to refill the second medium chamber 140 with a gaseous medium M 1 or a liquid medium M 2 .
  • the second check valve 160 is designed, in the first switching state S 1 of the solenoid valve 110 . 1 , to prevent escape of the gaseous medium M 1 held in the second medium chamber 140 or of the liquid medium M 2 via the medium connection 122 .
  • the gaseous medium M 1 or the liquid medium M 2 in the second medium chamber 140 acts exclusively on the first nozzle connection 123 in order to be delivered via the latter to a nozzle for supplying a medium pulse MP of the gaseous medium M 1 or of the liquid medium M 2 in the second medium chamber 140 to a surface O.
  • FIG. 3B and FIG. 3C schematically show the first switching state S 1 and the second switching state S 2 of the 3/2-way solenoid valve 110 . 1 as a preferred embodiment of the switching valve 110 , wherein the solenoid valve 110 . 1 has a pressure cylinder connection 111 , a first medium source connection 112 and a second nozzle connection 113 .
  • FIG. 3B shows the energized switching state, that is to say the first switching state S 1 of the solenoid valve 110 . 1 .
  • an electromagnet produces a counterforce to the spring force produced by the spring 180 in order to connect the first medium connection 112 through to the pressure cylinder connection 111 .
  • the gaseous medium M 1 can flow from the first medium connection 112 via the pressure cylinder connection 111 to the first medium chamber 130 of the pressure cylinder 120 .
  • FIG. 3C shows the deenergized switching state, that is to say the second switching state S 2 of the solenoid valve 110 . 1 .
  • the solenoid valve 110 . 1 switches the second nozzle connection 113 through to the pressure cylinder connection 111 . That is, the pressurized gaseous medium M 1 escapes from the first medium chamber 130 via the second nozzle connection 113 of the solenoid valve 110 . 1 .
  • the switching valve 110 can be designed as a solenoid valve 110 . 1 , and the solenoid valve 110 . 1 can have a valve cross section VQ 1 , which is illustrated schematically in FIG. 3B and FIG. 3C .
  • the switching valve 110 can also be designed as a double check valve 110 . 2 , wherein the double check valve 110 . 2 has a second valve cross section VQ 2 .
  • FIG. 4 shows specifically a schematic illustration of one embodiment of a compressed air system 200 .
  • the present compressed air system 200 also has a first medium source MQ 1 , in particular a compressed air source, and a second medium source MQ 2 , in particular a water source.
  • the switching valve 110 from FIG. 1 is designed as a double check valve 110 . 2 , as an alternative variant embodiment to the solenoid valve 110 .
  • FIG. 4 schematically shows a number of nozzles 240 , and the surface O here forms the transparent cover 211 of a sensor 210 , in particular of an environment detection sensor 212 .
  • FIG. 4 also shows that the pressure cylinder connection 111 of the double check valve 110 . 2 is connected via a first medium feed line 220 to the pressure connection 121 of the pressure cylinder 120 or of the first medium chamber 130 .
  • the second medium source MQ 2 is connected via a second medium feed line 230 to the medium connection 122 of the pressure cylinder 120 or of the second medium chamber 140 , wherein the second check valve 160 is furthermore arranged in the second medium feed line 230 .
  • FIG. 4 also shows that the pressure cylinder connection 111 of the double check valve 110 . 2 is connected via a first medium feed line 220 to the pressure connection 121 of the pressure cylinder 120 or of the first medium chamber 130 .
  • the second medium source MQ 2 is connected via a second medium feed line 230 to the medium connection 122 of the pressure cylinder 120 or of the second medium chamber 140 , wherein the second check valve 160 is furthermore arranged in the second medium feed line 230 .
  • first nozzle connection 123 of the pressure cylinder 120 or of the second medium chamber 140 is connected to a number of nozzles 240 via a first nozzle feed line 250 , wherein the first check valve 150 is furthermore arranged in the first nozzle feed line 250 .
  • second nozzle connection 113 of the double check valve 110 . 2 is connected to the number of nozzles 240 via a second nozzle feed line 260 .
  • FIG. 5 shows a schematic illustration of another preferred embodiment of a compressed air system 200 .
  • the switching valve 110 from FIG. 1 is again shown to be designed as a 3/2-way solenoid valve 110 . 1 .
  • the present embodiment of a compressed air system 200 has a second switching valve 170 .
  • the second switching valve 170 also has a second pressure cylinder connection 171 , a second medium source connection 172 , to which a second medium source MQ 2 can be connected, and a third medium source connection 173 , to which a third medium source MQ 3 , in particular the ambient air, can be connected.
  • the second pressure cylinder connection 171 is in turn connected via the second medium feed line 230 to the medium connection 122 of the second medium chamber 140 of the pressure cylinder 120 .
  • a first switching state S 3 of the second switching valve 170 the second medium source connection 172 is switched through to the second pressure cylinder connection 171 .
  • the second medium source MQ 2 also provides the liquid medium M 2 , in particular water, at the second medium source connection 172 . Consequently, in the first switching state S 3 of the second switching valve 170 , the second medium chamber 140 of the pressure cylinder 120 sucks in, in particular, the liquid medium M 2 via the medium connection 122 .
  • the second medium source connection 173 is in turn switched through to the second pressure cylinder connection 171 .
  • the third medium source MQ 3 furthermore provides the gaseous medium M 1 , in particular ambient air, at the third medium source connection 173 . Consequently, in the second switching state S 4 of the second switching valve 170 , the second medium chamber 140 of the pressure cylinder 120 sucks in, in particular, the gaseous medium M 1 from the third medium source MQ 3 , i.e. ambient air, via the medium connection 122 .
  • the second medium chamber 140 of the pressure cylinder 120 sucks in, in particular, the gaseous medium M 1 from the third medium source MQ 3 , i.e. ambient air, via the medium connection 122 .
  • the second medium chamber 140 can be connected via the medium connection 122 to the second medium source connection 172 in the first switching state S 3 of the second switching valve 170 , and to the third medium source connection 173 in the second switching state S 4 of the second switching valve 170 .
  • the second switching valve 170 controls the filling of the second medium chamber 140 of the pressure cylinder 120 with either a gaseous medium M 1 or with a liquid medium M 2 .
  • a source for a multiphase mixture for example steam, would also be conceivable as the third medium source MQ 3 .
  • FIG. 6 shows a schematic illustration of a sequence of a cleaning process 600 .
  • the cleaning process for supplying a medium pulse MP to a surface O passes through the following steps.
  • pulse-type charging 610 of the first medium chamber 130 of the pressure cylinder 120 with the gaseous medium M 1 , in particular with compressed air first of all takes place.
  • pulse-type discharge 640 of the gaseous medium M 1 , in particular compressed air, from the first medium chamber 130 of the pressure cylinder 120 then takes place.
  • FIG. 7 shows a schematic illustration of a control system 700 , wherein the control system 700 carries out the steps of the cleaning process 600 for a compressed air system 200 by means of the open-loop and/or closed-loop control device 710 in order to supply a medium pulse MP to a surface O.
  • This involves, in particular, switching over switching valve 110 , which has a first pressure cylinder connection 111 , a first medium source connection 112 and a second nozzle connection 113 and is designed for switching into a first switching state S 1 and a second switching state S 2 .
  • switching valve 170 which has a second pressure cylinder connection 171 , a second medium source connection 172 and a third medium source connection 173 for selecting a first switching state S 3 and a second switching state S 4 .
  • FIG. 8 shows a schematic illustration of a vehicle 800 —in the present case in the form of a passenger car—having a compressed air system 200 with an environment detection sensor 210 of a sensor system 810 , wherein the environment detection sensor 210 has a transparent cover 211 , and further having a control system 700 .
  • the first medium source MQ 1 is formed by a compressed air supply system 840 , which is furthermore provided for supplying a pneumatic system 830 in the form of an air spring system.
  • the first medium source MQ 1 it is also possible for the first medium source MQ 1 to be formed by a separate compressor or similar compressed air source.
  • the first medium source MQ 1 is connected to the compressed air system 200 via a first medium feed line 220 .
  • the second medium source MQ 2 has a water tank WT, which is likewise used to supply a cleaning system in the form of a window cleaning system 820 with cleaning liquid, in particular water.
  • This tank is connected via a second medium feed line 230 to the compressed air system 200 .
  • the liquid medium M 2 can be supplied to the compressed air system 200 via a pump (not shown here for reasons of clarity).
  • the second medium source MQ 2 it is also possible in the case of the second medium source MQ 2 for this to be formed by a separate medium source of its own, which is, in particular, independent of other systems.
  • the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise.
  • the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Water Supply & Treatment (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Cleaning In General (AREA)
US17/606,472 2019-05-03 2020-04-28 Cleaning device, compressed air system and cleaning method for supplying a medium pulse to a surface and corresponding control system and vehicle Pending US20220193734A1 (en)

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DE102019111468.3A DE102019111468A1 (de) 2019-05-03 2019-05-03 Reinigungsvorrichtung, Druckluftsystem und Reinigungsverfahren zum Beaufschlagen einer Oberfläche mit einem Mediumspuls sowie entsprechendes Steuersystem und Fahrzeug
DE102019111468.3 2019-05-03
PCT/EP2020/061715 WO2020225023A1 (de) 2019-05-03 2020-04-28 Reinigungsvorrichtung, druckluftsystem und reinigungsverfahren zum beaufschlagen einer oberfläche mit einem mediumspuls sowie entsprechendes steuersystem und fahrzeug

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WO2020225023A1 (de) 2020-11-12
EP3962670A1 (de) 2022-03-09

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